Window scaffold



J. VICTOR WINDOW SCAFFOLD Feb. 20, 1934.

Filed May 26, 1932 3 Sheets-Sheet l INVENTOR ATTORN EY J. VICTOR WINDOW SCAFFOLD Feb. 20, 1934.

Filed May 26 1952 3 Sheets-Sheet 2 are n-fo 7; M

Feb. 20, 1934. J. VICTOR v 1,947,629

WINDOW SCAFFOLD Filed May 26, 1932 3 Sheets-Sheet 3 INVENTOR dug 06M ATTORNEY Patented F eb. 20, 1934 PATENT QFFICE WINDOW Julius Victor,

SCAFFOLD Detroit, Mich.

Application May 26, 1932. Serial No. 613,652

7 Claims.

This invention relates to a scaffold or like appliance designed for use on windows, whereby painting, window cleaning and like operations exteriorly of the building may be safely conducted.

One of its objects is the provision of a safety window appliance of this character which is light in weight and yet strong and sturdy in construction, providing maximum safety to the user, and

which is so designed that no weight or strain is placed upon the apron or stool of the window frame.

Another object of the invention is to provide a scaffold for windows which is adjustable to accommodate it to varying window and building structures, and which is capable of being compactly folded when not in use or for storage or shipment purposes.

Other features of the invention reside in the construction and arrangement of parts hereinafter described, and particularly pointed out in the appended claims.

In the accompanying drawings:-Figure 1 is i, a side elevation of my improved scaffold. Figure 2 is an enlarged top plan view thereof, partly in section. Figure 3 is a vertical longitudinal section taken in the plane of line 3--3, Figure 2. Figure 4 is an enlarged fragmentary cross section taken on line 44, Figure 2. Figure 5 is a cross section taken on line 5-5, Figure 2. Figure 6 is an enlarged vertical section taken on line 66, Figure 1. Figure '7 is a. rear view of this scaffold.

Similar characters of reference indicate corresponding parts throughout the several views.

This improved scaffold is adapted to be detachably supported from a window and particularly to be hooked over the bottom frame of the window in overlying relation to the inner and outer sills 10 and 11, respectively, and to abut at its inner or hooked end against the inside wall 12 below the corresponding sill without danger of marring or otherwise injuring the window frame.

In the preferred embodiment of my invention shown in Figures 1-7, inclusive, the scaffold is substantially in the form of a chair or seat-like structure supported in the manner just described, and consists of parallel, horizontal supporting rails or bars 13 terminating at their inner ends in depending anchoring hooks 14 and tied in alining spaced relation immediately outwardly of their hooked ends by a transverse rail or channel 15 which may be welded or otherwise secured at its ends to the inner faces of the rails 13. Supported upon the rails 13 is a platform 16 for the worker, said platform being adjustable lengthwise of its supporting rails to properly position it relative to the window or exterior wall of the building. To this end, this platform is provided at its opposite sides with tubular guide members 17 which are telescoped or slidingly fitted over the supporting rails 13 in the manner shown in Figures 2, 5 and 6, whereby the platform may move lengthwise relative to these rails. The platform 16 is preferably stamped or otherwise formed from sheet metal and is preferably corrugated in the manner shown in Figures 2 and 3, to render it stiff and strong and yet light in weight. The hooks 14 of the supporting rails, it will be noted, extend downwardly and thence outwardly clear of the window sill and adjoining parts, their free ends abutting against the inner wall below the sill.

At its outer end, the platform is preferably provided with a folding back or guard member indicated generally by the numeral 18 and consisting of a substantially U-frame 19 and cross slats 20. The lower ends of the U-frame 19 are pivoted at 21 to companion brackets 22 provided with inwardly-facing ears or lugs 23 which are suitably anchored in the outer ends of the corresponding platform guides 17, in the manner shown in Figures 1 and 2. Foldable brace links 24 pivoted to the guard member and platform at 25 and 26, respectively, serve in conjunction with a chain or like flexible member 27 to hold the guard member in the operative position shown in Figure l.

Depending from the outer end of the platform for abutting engagement with the exterior wall of the building, is a foldable brace member 28 which may be U -shape in form and properly reinforced by a cross strut 29. The upper free ends of this depending brace are pivotally conbrackets 22 of the platform. The lower end of the brace 28 is adapted to abut against the wall of the building to assist in supporting the platform 16 against vertical displacement. A chain or like flexible member 32 connected at one end to the brace and at its other end to the platform, serves to permit the desired adjustment of the brace to properly position it for a given installation. When the scaffold is not in use, the guard rail 18 and depending brace member 28 may be folded against the opposite sides of the platform 16, making a compact unit which is easy to handie as well as pack for storage or shipment.

The longitudinal or horizontal adjustment of the platform on its supporting rails 13 is preferably effected by a screw 33 arranged substantially centrally at the inner end of the platform parallel relation thereto and supported and held cilitating the turning thereof when it is desired to efiect the longitudinal adjustment of the platform.

For the purpose of preventing side-racking or binding of the platform 16 on its supporting rails 13 and to further effectually brace these parts relative to each other, I provide a stabilizing member or yoke 36 of substantially V-shape form which is disposed lengthwise beneath the platform and is fixed at its free inner ends to the cross bar 15, while its outer end is joined to a relatively movable connection or coupling disposed lengthwise and centrally of the platform. As shown in Figures 2, 3 and 4, this relatively movable connection consists of a longitudinally grooved or recessed bar 37 secured to the underside of the platform in alinement with the adjusting screw 33 and having a longitudinal slot 38 therein for receiving the shank of a coupling pin 39 carried by the yoke 36, the head 40 of this pin riding in the grooved top side of the rail. At its outer end the longitudinal slot 38 terminates in an enlargement 41 through which the head 40 of the coupling pin may be passed during the assemblage of the parts. By this construction, the platform is effectually braced or stabilized and guided for movement in a straight path.

Vertical adjustment of the scaffold to adapt it to different types and sizes of windows is effected through the medium of vertically-adjust- 42 applied to opposite sides of the platform 16 and adapted to hear at their lower ends upon the outer window-sill ll. These posts are guided for vertical movement in sleeves or housings 43 applied to the outer sides of the platform guide-tubes l7 and each post is provided with a threaded-bore 44 in which an adjusting screw 45 is arranged. Each adjusting screw is held against vertical displacement in the manner shown at :6 in Figure 6, so that upon turning the screw in one direction or the other, the post 42 is accordingly raised or lowered to effect the adjustment desired.

The inner ends of the supporting rails 13 may be provided with cushioned shoes or elements 47 which rest upon the inner window sills l0 and prevent marring thereof, while the ends of the hooks 14 are connected by a transverse bar 43 having a rubber cushion 49 applied thereto which abuts against the inner wall of the building.

I claim as my invention:-

1. A window scaffoid of the character described comprising supporting rails provided at their inner ends with hook-like elements adapted to overlie the window-sill and to abut at their free ends against the interior of the building wall below the sill, and a sheet metal platform disposed between said rails and having tranverse corrugations therein terminating short of the able posts marginal longitudinal edges thereof, said plat form having tubular guides at its opposite longitudinal edges slidably engaging the supporting rails.

2. A window scaffold of the character described, comprising supporting rails provided at their inner ends with hook-like elerrents adapted to overlie the window-sill and to abut against the interior of the building wall below the sill, a platform disposed between said rails and having guide means at its opposite longitudinal edges slidingly engageable with said rail, means for adjusting the platform lengthwise relative to the supporting rails, and means applied to the platform and engageable with the outer sill of the window for effecting the vertical adjustment of the platform relative thereto, said vertically adjustable means including a tubular housing, a post slidingly fitted therein, and an adjusting screw engaging said post and held against longitudinal movement relative to the housing.

3. A window scaffold, comprising supporting rails detachably engageable with the window frame and projecting outwardly therefrom in spaced, horizontal relation, a tie member connecting the inner ends of said rails, a platform disposed between the rails and mounted thereon for movement lengthwise thereof, and a stabilizing member disposed beneath the platform and rigidly connected at one end to said tie member and having relatively sliding connection between its opposite end and the platform.

4. A window scaffold, comprising supporting rails detachably engageable with the window frame and projecting outwardly therefrom in spaced, horizontal relation, a tie member connecting the inner ends of said rails, a platform disposed between the rails and mounted thereon for movement lengthwise thereof, a stabilizing member disposed beneath the platform and rigidly connected at its inner end to said tie member, and a coupling element applied to the outer underside of the platform and slidingly connected to the outer end of said stabilizing member.

5. A window scaffold, comprising supporting rails detachably engageable with the window frame and projecting outwardly therefrom in spaced, horizontal relation, a tie member connecting the inner ends of said rails, a platform disposed between the rails and mounted thereon for movement lengthwise-thereof, a stabilizing member disposed beneath the platform and rigidly connected at its inner end to said tie member, and means for slidingly connecting said platform to the outer end of said stabilizing member consisting of a longitudinally-slotted bar applied to the underside of the platform and a coupling pin fixed to the outer end of said stabilizing member and engaging the slot in said bar.

6. A window scaffold, comprising supporting rails detachably engageable with the window frame and projecting outwardly therefrom in spaced, horizontal relation, a platform disposed between the rails and mounted thereon for movement lengthwise thereof, housings applied to opposite sides of the platform and containing vertically adjustable, internally-threaded posts adapted to abut at their lower ends. on the sill of the window, and screws engaging the threaded bores of said posts and held against axial movement relative thereto.

'7. A window scaffold, comprising supporting rails detachably engageable with the window frame and projecting outwardly therefrom in spaced, horizontal relation, a platform disposed between the rails and mounted thereon for movement lengthwise thereof, a substantially V- shaped stabilizing yoke disposed beneath the platform and fixed at its diverging ends between said rails, a coupling element applied to the underside of the platform and slidingly connected to the apex of said yoke, and means for adjusting the platform lengthwise of said rails.

JULIUS VICTOR. 

